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Table 4 Potential determinants of maternal erythrocyte omega-3 index and n-6/n-3, AA/EPA and LA/DGLA ratios

From: Low omega-3 index values and monounsaturated fatty acid levels in early pregnancy: an analysis of maternal erythrocytes fatty acids

Variable Index Ratio
IOM3 n-6/n-3 AA/EPA LA/DGLA
Age (years) r = 0.19 r = −0.16 r = − 0.19 r = − 0.29
Gestational age (weeks) r = 0.25 r = − 0.27 r = 0.06 r = − 0.01
Parity
 Nulliparous 5.52 ± 1.08 4.50 ± 1.08 37.9 ± 17.7 5.95 ± 1.46
 Primiparous 5.89 ± 1.67 4.40 ± 1.41 32.4 ± 16.6 5.97 ± 1.56
 Multiparous 5.86 ± 2.00 4.54 ± 1.61 34.8 ± 16.8 5.53 ± 1.38
BMI class (kg/m2)
  < 25 5.61 ± 1.45 4.57 ± 1.41 35.3 ± 17.9 5.74 ± 1.47
 25–30 6.13 ± 1.99 4.22 ± 1.36 31.7 ± 15.5 5.98 ± 1.47
 ≥ 30 5.96 ± 1.25 4.21 ± 1.01 36.8 ± 13.1 5.91 ± 1.57
Nationality
 Belgian 5.52 ± 1.50 4.59 ± 1.30 31.6 ± 12.1 5.48 ± 1.32
 Other 6.12 ± 1.67 4.25 ± 1.43 38.1 ± 20.9 6.26 ± 1.55
Level of education
 Low 5.70 ± 1.83 4.63 ± 1.54 37.2 ± 19.5 5.95 ± 1.47
 High 5.93 ± 1.14 4.13 ± 0.93 29.9 ± 9.81 5.61 ± 1.46
Smoking status
 Non-smoker 5.93 ± 1.61 4.33 ± 1.36 34.6 ± 17.1 5.87 ± 1.49
 Smoker 4.68 ± 1.04 5.26 ± 1.15 33.7 ± 14.7 5.42 ± 1.28
Physical activity     
 Yes 6.39 ± 1.68 3.95 ± 1.15 28.9 ± 12.8 5.89 ± 1.68
 No 5.54 ± 1.51 4.64 ± 1.40 36.7 ± 17.8 5.80 ± 1.39
n-3 PUFA supplement use
 Yes 6.07 ± 1.51 4.21 ± 1.47 31.4 ± 17.8 5.76 ± 1.33
 No 5.69 ± 1.63 4.52 ± 1.33 35.5 ± 16.5 5.84 ± 1.52
EPA supplement intake (mg/day) r = 0.03 r = − 0.01 r = − 0.08 r = − 0.14
DHA supplement intake (mg/day) r = 0.60 r = − 0.70 r = − 0.67 r = − 0.33
  1. Data are presented as mean ± SD or as Pearson correlation coefficient
  2. Bold font indicates P-values less than 0.05